body {
  overflow: hidden;
}
#wrapper {
  height: 100%;
}
.top-header {
  background: #f4f4f7;
  border-bottom: 1px solid #e8e8e8;
  padding: .5rem 1rem;
  flex-shrink: 0;
}
.go-back {
  color: #c0c0c0;
  font-size: 1.75rem;
  position: absolute;
  left: -40px;
  top: -5px;
}
.op-bar {
  padding: 9px 10px;
  background: #f2f2f2;
  border-radius: 2px;
}
.op-bar-btn {
  border-color: #ccc;
  border-radius: 2px;
  height: 30px;
  line-height: 28px;
  font-weight: normal;
  padding: 0 0.5rem;
  min-width: 55px;
}
.heading-commit-time {
  font-weight: normal;
  font-size: 60%;
}